Citadel Advisors
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Citadel Advisors’s ASP Isotopes ASPI Stock Holding History

Citadel Advisors’s Portfolio ASPI Stock Details ASPI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.16M Buy
714,500
+82,000
+13% +$485K ﹤0.01% 5168
2025
Q4 		$3.38M Buy
632,500
+120,700
+24% +$960K ﹤0.01% 4945
2025
Q3 		$4.92M Buy
511,800
+43,300
+9% +$399K ﹤0.01% 4393
2025
Q2 		$3.45M Buy
468,500
+277,200
+145% +$1.86M ﹤0.01% 4737
2025
Q1 		$897K Buy
191,300
+58,000
+44% +$289K ﹤0.01% 7206
2024
Q4 		$604K Buy
+133,300
New +$710K ﹤0.01% 8144

Other funds holding ASPI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
ECA
Encompass Capital Advisors New York $3.34B AUM 167.64% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
RIM
Rovida Investment Management Grand Cayman, Cayman Islands $797M AUM 111.83% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
ETC
Exchange Traded Concepts Oklahoma City, Oklahoma $14.1B AUM 25.71% 1-Year Est. Return
AIC
AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return

Citadel Advisors's ASPI Position: Q1 2026 in Review

Citadel Advisors reduced its ASP Isotopes (ASPI) stake by 55% in Q1 2026, selling an estimated $5.66M and leaving 768,006 shares worth $3.39M. The position accounts for ﹤0.01% of the portfolio, ranked #5017.

Citadel Advisors first reported a position in ASPI in Q4 2023 and has held it in 6 quarters since. The position peaked at $11.2M in Q3 2025. 177 funds tracked by Wall St. Rank hold ASPI as of Q1 2026.

  • Citadel Advisors held 768,006 shares of ASP Isotopes worth $3.39M as of Q1 2026.
  • Citadel Advisors sold 957,547 ASP Isotopes shares in Q1 2026, an estimated $5.66M.
  • ASP Isotopes made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #5017 holding.
  • Citadel Advisors first reported a position in ASP Isotopes in Q4 2023 and has held it in 6 quarters since.
  • Citadel Advisors's ASP Isotopes position peaked at $11.2M in Q3 2025.
  • 177 funds tracked by Wall St. Rank held ASP Isotopes as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.